US2415381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophilic colloid color formers and photographic elements containing the same
Assignee: EIDP Inc
•
Filing: 1944-03-31
•
Granted: 1947-02-04
•
Expires: 1964-03-31
Abstract
No abstract record available.
Inventors
- 👤 David W Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:27
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/327; G03C7/3275
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2186849A
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US2306410A
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US2186733A
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US2292575A
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US2310943A
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US2286215A
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US2320422A
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GB537256A
Cited
US2282001A
Cited
US2330291A
Cited
US2297732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-03 | 1950-08-05 | 1951-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-03 | 1954-08-05 | 1955-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-03 | 1958-08-05 | 1959-02-04 | $7700.00 | Window Closed / Lapsed |